Nithya Yoga prepares the body, prepares the mind to enter into the experience of enlightenment and stay into the experience of enlightenment. Entering is not difficult. To have a satori, a glimpse of the no-mind state, to have an experience of un-clutching, is not difficult at all. But to stay in that consciousness, and especially to express that energy through your body, requires that your body and mind be prepared. Staying in that same space, that consciousness, and expressing it needs preparation.